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Geokon 4800 Series Manuals
Manuals and User Guides for Geokon 4800 Series. We have
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Geokon 4800 Series manuals available for free PDF download: Instruction Manual
Geokon 4800 Series Instruction Manual (42 pages)
Brand:
Geokon
| Category:
Measuring Instruments
| Size: 1.26 MB
Table of Contents
Table of Contents
5
1 Introduction
7
Theory of Operation
7
Equation 1 - Terzaghi ' Sp
7
Rinciple of Effective Stress
7
Figure 1 - Stress Redistribution
8
Figure 2 - Stress Redistribution
8
Figure 3 - Stress Redistribution
8
Earth Pressure Cell Design
9
Earth Pressure Cell Construction
10
Model 4800 Earth Pressure Cells
10
Figure 4 - Model 4800 R
10
Figure 5 - Model 4800 Circular
10
Ectangular Earth Pressure Cell
10
Earth Pressure Cell
10
Model 4810 Contact ("Fat Back") Pressure Cell
11
Model 4815 Hydraulic Load Cell
11
Figure 6 - Model 4810 Contact
11
Figure 7 - Model 4815 Hydraulic
11
Pressure Cell
11
Load Cell
11
Model 4820 Earth Pressure "Jackout" Cell
12
Model 4830 Push-In Pressure Cell
12
Figure 8 - Model 4820 Jackout
12
Figure 9 - Model 4830 Push -I N
12
Pressure Cell
12
2 Installation
13
Preliminary Tests
13
Pressure Cell Installation
13
Installation of Model 4800 Earth Pressure Cells Inside Fills and Embankments
13
Figure 10 - Model 4800 Earth
14
Pressure Cell Installation
14
Table 1 - Ratios for Two Grout
15
Figure 11 - Attachment Ofm
16
Installation of Model 4810 Contact ("Fat Back") Pressure Cell
16
Odel 4810 to Concrete Form
16
Figure 12 - Model 4810 Contact
17
Figure 13 - Model 4815 Hydraulic
18
Installation of Model 4815 Hydraulic Load Cell
18
Oads on a Tunnel Lining
18
Installation of Model 4820 Jackout Pressure Cell in Slurry Trenches
19
Figure 14 - Model 4820 Jackout
19
Installation of Cells to Measure Earth Pressure at the Base of Footings, Floor Slabs, Pavements, Etc
20
Figure 15 - Model 4800-1-1P E
20
Installation of Push-In Pressure Cells to Measure Lateral Earth Pressures
21
Cable Installation and Splicing
22
Electrical Noise
23
Initial Readings
23
3 Taking Readings
24
Gk-404 Readout Box
24
Operating the GK-404
24
Figure 16 - Lemo Connector to
24
Gk-405 Readout Box
25
Connecting Sensors with 10-Pin Bulkhead
25
Connecting Sensors with Bare Leads
25
Operating the GK-405
25
Figure 17 - Live Readings - R
25
GK-403 Readout Box (Obsolete Model)
26
Connecting Sensors with 10-Pin Bulkhead
26
Connecting Sensors with Bare Leads
26
Operating the GK-403
26
Measuring Temperatures
27
4 Data Reduction
28
Pressure Calculation
28
Table 2 - Engineering Unitsm
28
Equation 2 - Digits Calculation
28
Equation 3 - Convert Digits to
28
Ressure
28
Temperature Correction
29
Barometric Correction
29
Equation 4 - Temperaturec
29
Only
29
Figure 18 - Sample Model
30
5 Troubleshooting
31
Table 3 - Sample Resistance
32
Table 4 - Resistance Works
32
Appendix A. Specifications
33
Earth Pressure Cells
33
Standard Temperature Thermistor
33
Table 5 - Earth Pressure Cell
33
Appendix B. Thermistor Temperature Derivation
34
Table 6 - Thermistorr
34
Equation 5 - Resistance Tot
34
Orrection for the Transducer Emperature
34
Appendix C. High Temperature Thermistor Linearization
35
Table 7 - Thermistorr
35
Equation 6 - High Temperature
35
Igh Temperature Models
35
Appendix D. Temperature Effect on Earth Pressure and Concrete Stress Cells
36
Formulas
36
Figure 19 - Radius (R) Andt
36
Equation 7 - Expansion Ofl
36
Equation 8 - Compression of
36
Equation 9 - Expansion Ofl
36
Aw Readings 4800 Calibration Sheet Hickness (D)
36
Resistance to Temperature Iquid for a Temperature Rise of Liquid
36
Iquid
36
1° C
36
Equation 10 - Deformation at the Equation 11 - Deformation at the
37
Equation 12 - Difference Ind
37
Equation 13 - Average Total
37
Equation 14 - Combinede
37
Center
37
Edge
37
Eformation
37
Expansion of the Cell
37
Quations
37
Table 8 - Typical Values Ofv
38
Equation 15 - Total Embedment
38
Equation 16 - Total Embedment for
38
Arious Cell Parameters
38
Examples
39
D.2 E Xamples
39
Appendix E. Non Linearity and the Use of a Second Order Polynomial to Improve the Accuracy of the Calculated Pressure
41
Heet
41
On Calibration Sheet
41
Olynomial
41
Eading from the Calibration Sheet
42
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Geokon 4800 Series Instruction Manual (40 pages)
VW Earth Pressure Cells
Brand:
Geokon
| Category:
Industrial Equipment
| Size: 2.17 MB
Table of Contents
Table of Contents
5
Introduction
11
Theory of Operation
11
Figure 1: Stress Redistribution, Weak Soil with Stiff Cell
11
Equation 1: Terzaghi's Principle of Effective Stress
11
Earth Pressure Cell Design
12
Figure 2: Stress Redistribution, Strong Soil with Stiff Cell
12
Figure 3: Stress Redistribution, Stiff Soil with Weak Cell
12
Earth Pressure Cell Construction
13
Model 4800 Earth Pressure Cells
13
Figure 4: Model 4800 Rectangular Earth Pressure Cell
13
Figure 5: Model 4800 Circular Earth Pressure Cell
13
Model 4810 Contact ("Fat Back") Pressure Cell
14
Model 4815 Hydraulic Load Cell
14
Figure 6: Model 4810 Contact Pressure Cell
14
Figure 7: Model 4815 Hydraulic Load Cell
14
Model 4820 Earth Pressure "Jackout" Cell
15
Model 4830 Push-In Pressure Cell
15
Figure 8: Model 4820 Jackout Load Cell
15
Figure 9: Model 4830 Push-In Pressure Cell
15
Installation
16
Preliminary Tests
16
Pressure Cell Installation
16
Inside Fills and Embankments
16
Figure 10: Model 4800 Earth Pressure Cell Installation
17
Installation of Model 4810 Contact ("Fat Back") Pressure Cell
18
Table 1: Ratios for Two Grout Mixes
18
Figure 11: Attachment of Model 4810 to Concrete Form
19
Figure 12: Model 4810 Contact Pressure Cell Installation
19
Installation of Model 4815 Hydraulic Load Cell
20
Installation of Model 4820 Jackout Pressure Cell in Slurry Trenches
20
Figure 13: Model 4815 Hydraulic Load Cell Measuring Loads
20
Installation of Cells to Measure Earth Pressure at the Base of Footings, Floor Slabs, Pavements, Etc
21
Figure 14: Model 4820 Jackout Pressure Cell Installation
21
Installation of Push-In Pressure Cells to Measure Lateral Earth Pressures
22
Figure 15: Model 4800-1-1P Earth Pressure Cell Installation
22
Cable Installation and Splicing
23
Table 2: 4830 Wiring Chart
23
Electrical Noise
24
Initial Readings
24
Taking Readings
25
Operating the Gk-404
25
Gk-405 Vibrating Wire Readout
25
Figure 16: Gk-404 Readout
25
Figure 17: Lemo Connector to Gk-404
25
Figure 18: Gk-405 Readout
25
Connecting Sensors with 10-Pin Bulkhead Connectors Attached
26
Connecting Sensors with Bare Leads
26
Operating the Gk-405
26
Measuring Temperatures
26
Data Reduction
27
Pressure Calculation
27
Table 3: Engineering Units Multiplication Factors
27
Equation 2: Digits Calculation
27
Equation 3: Convert Digits to Pressure
27
Temperature Correction
28
Barometric Correction
28
Equation 4: Temperature Correction
28
Figure 19: Sample Model 4800 Calibration Sheet
29
Troubleshooting
30
Appendix A. Specifications
31
Earth Pressure Cells
31
Standard Temperature Thermistor
31
Table 4: Earth Pressure Cell Specifications
31
Appendix B. Thermistor Temperature Derivation
32
Table 5: 3Kω Thermistor Resistance
32
Equation 5: 3Kω Thermistor Resistance
32
Appendix C. Temperature Effect on Earth Pressure and Concrete Stress Cells
33
Formulas
33
Figure 20: Radius (R) and Thickness (D)
33
Equation 6: Expansion of Liquid for a 1° C Temperature Rise
33
Equation 7: Compression of Liquid
33
Equation 8: Expansion of Liquid
33
Equation 9: Deformation at the Center
33
Equation 10: Deformation at the Edge
34
Equation 11: Difference in Deformation
34
Equation 12: Average Total Expansion of the Cell
34
Equation 13: Combined Equations
34
Equation 14: Total Embedment
34
Equation 15: Total Embedment for Contact Pressure Cells
34
Examples
35
Table 6: Typical Values of Various Cell Parameters
35
Appendix D. Improving Calculated Pressure Accuracy
37
Equation 16: Pressure Calculation with Second Order Polynomial
37
Equation 17: "Linearity (%F.s.)" on Calibration Sheet
37
Equation 18: Calculating C Using the Zero Pressure Reading
37
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